Brake-shoe.



(j, W. ARMBRUS'H BRAKE SHOE APPLICATION FILED FEB.!9.191B.

Patented; July 3, 1917.

GHARLES W. ARMIBRUST, OF CHICAGO, ILLINOIS, ASSIGNOR, BY E-ASSIGNMENTS, TO THE AMERICAN BRAKE SHOE & FOUNDRY COMPANY, OF WILMINGTON, DELA- earner.

"WARE, A CORPORATION OE DELAWARE.

To all'whom it may concern:

Be it known that I, CHARLES W. 'ARMZ? BRUST, a citizen of the United States, residing at Chicago, in the county of. Cook and State of Illinois, have invented a'certain new and useful Improvement in Brake Shoes, of which the following is a full, clear, concise,'and exact description, reference'being had to the accompanying drawings,

forming a part of this specification.

My invention relates to brake shoes and is primarily concerned with a construction for.

- rake shoes in which a displacement or shifting of the brake shoe'relative to the brake head may be obtained, thus to secure an even wear of the brake shoe, thereby insuring a lon er life, and offcourse better braking qua ities, and taking unnatural strain ofi' of the brake apparatus.

In one form'of carrying out my invention, I so arran e the brake shoe that it is shiftingly held y the brake head to thus permit of a slight tilt or shift to permit the brake' shoe to engage the wheel evenly throughout the entire braking surface of the brake shoe.

. This particular form of carrying out my invention is the one I have selected for illus tration herein, although of course as is apparent, my invention is capable of many and various modifications within its scope, this particular form however being illustrated in Y bra the accompanying drawing, in which Figure 1 is a side view partly in section of a brake shoe and brake'head constructed in accordance withmy invention;

Fig. "2 is a section on 'line H of Fig. 1;

Fig. 3 is a section on line 6-4) of Fig. 1, and

4 is a section on line 0-0 of Fig. 1.

In the drawings I show a brake head 1' ada ted to support a brake shoe 2. .This l e shoe may have any suitable style of I metal back 3'. The brake shoe is provided j The metal of the brake shoe isrou'nded as shown more clearly at 6 where this metal engages the inner side of the key 5. This key 5 of course. passes through the brake 2 head as readily apparent, the key being permitted a slight movement as seen more i snon.

- clearly as the illustration in Fig.1. The

brakeshoe is also provided with guide lugs 7 and 8 which-normally-engage the inner surface of the arms of the brake head. The holding lugs 9 and lOrprovided upon the brake head between which the key lug 4 is .mounted are large enough so there is a certain clearance between the keylug and the cooperating lugs 9 and 10 provided upon Itfwill thus be seen, referring to Fig. 1,

course contemplates that in the ordinary o eration the-guide lugs 7 and 8 will slide a ong the curved surface of the brake head to permit the shoe to adjust itself against the surface of the wheel.

There is. thus provided a construction which permits of a shifting movement of the brake shoe whereby the accommodation desiredmay be eifected. Of course, suitable play is permitted at the brake head seats so as to permit of the shoe sliding along the base of the end lugs 11. The rounded sur- Speciflcation of Letters Patent. Patgntgqfl July 3, 119117;, I Application filed February 19, 1916. Serial No. 79,238.

1 the brake head- "that the brake shoe may be permitted a slight shifting movement between the limits of movement permitted between the key lug and the lugs 9 and 10. This movement of face' 6 cooperates in this connection, if

needed.

From what. has been described the nature of-my invention will be readily clear to those skilled in theart. It will also be apparent that many forms of carrying out my invendesire to secure by Letters Patent is:

'tion will suggest themselves. Having how- 'ever thus described one form which my in vention may take, what I claim as new and.

1. A device of the character described com- Q r I prising a brake head, a brake shoe tiltably carried by said brake head, means whereby. 7

said brake shoe has a sliding engagement With said brake head to thereby permit said.

brake shoe to adjust its elf concentrically with the wheel, and a sliding key,-said sliding key serving as the sole means for hold ing said shoe and head together. a

2. A device of the character described comprising a brake head, a brake shoe shiftably carried by said brake head means whereby said brake shoe has a sliding engagement with said brake head to thereby permit said brake shoe to adjust itself concentrically with the wheel, and a sliding 'key, said sliding key serving as the sole means for holding said shoe and head together.

3. A device of the character described comprising a brake head, a brake shoe, means whereby said head and shoe are tiltingly engaged, means whereby said brakeshoe has a sliding engagement with said brake head to thereby permit said brake shoe to adjust itself concentrically with the wheel, and a key, said key serving as'the sole means for holding said head and shoe together. I

4:. A device of the character described comprising a brake head, a brake shoe, means whereby said head and shoe are shiftingly and tiltably engaged, and a key, said ke serving as the sole means for holding sald head and shoe together.

5. A device of the character described comprising a brake head, a brake shoe, means whereby said head and shoe are tiltingly engaged, and a key, said key serving as the sole means for holding said head and shoe together, said brake head having holding lugs and said brake shoe having a key lug capable of movement between said'holding lugs.

6. A device of the character described comprising a brake head, a brake shoe, means whereby said head and shoe are shiftingly engaged to thereby permit said brake shoe to adjust itself concentrically with the wheel, and a key, said key serving as the sole means for holding said head and shoe together, said brake head having holding lugs and said brake shoe having a key lug capable of movement between said holding lu s.

3. A device of the character described comprising a brake head, a brake shoe, means whereby-said head and shoe are slidably engaged to thereby permit said brake shoe to adjust itself concentrically with the wheel, and a key, said key serving as the sole means for holding said head and shoe together, said means including guide lugs rovided upon said brake shoe and engag- 1ng said brake head.

8. A device of the character described comprising a brake head, a brake shoe,

. means whereby said head and shoe are shiftingly engaged to thereby permit said brake shoe to adjust itself concentrically with the wheel, and a key, said key serving as the sole means for holding said head and shoe together, said means including guide lugs provided upon said brake shoe and engaging said brake head.

9. A device of the character. described comprising a brake head, a brake shoe, means whereby said head and shoe are tiltingly engaged, and a key, said key serving as the sole means for holding said head and shoe together, said means including guide lugs provided upon said brake shoe and en- 'whereby said brake shoe has a sliding means whereby said head and shoe are shiftingly engaged, and a key, said key serving as the sole means for holding said head and 9 shoe together, said means including guide lugs provided upon saidbra'ke shoe and engaging said brake head, said brake head having holding lugs and said brake .shoe having a key lug movably interposed be-. tween said holding lugs.

11. A device of the comprisin a brake head, a brake shoeftiltably carried by said brake head, means engagement with said brake head to thereby permit said brake shoe to adjust itself concentrically with the wheel, and a sliding key for holding said shoe and headtogether.

12. The combination of a brake head and a brake shoe, of means for slidably and tiltably securing the shoe to the head.

13. The combination with a brake head of a brake shoe and means for connecting said head and shoe to permit a combined swinging movement of said shoe relative tosaid head about an axis coincident with that of the wearing face of said shoe and an axis perpendicular with said first-mentioned axis and between said wearing face and head.

14. A brake shoe having a body and a reinforcing back bent to form the outer part of a key lug, there being a rounded projection on the body within the bent part of the Rack to form a bearing for the fastening 15. The combination with a brake head having oppositely disposed arms, and a brake shoe shiftably mounted on the head character described and having guide lugs arranged to engage the inner surface of said arms.

16. The combination with a brake head having oppositely disposed arms, and a brake shoe shifta'bly mounted on the head and having end lugs, a centrally disposed key lug, and guide lugs located between the end and key lugs to engage the inner surface tive to the head, and means for securing the shoe on the head.

18. The combination of a brake head having oppositely disposed arms, a brake shoe having seats at the back thereof and adjacent its ends to receive the ends of the brake shifting movement of the brake shoe rela head arms, said seats permitting a limited gage with said arms and cause the shoe to tilt when it is moved relatit'ely to the head,

and means for securing the shoe on the head.

In witness whereof, I hereunto subscribe 15 my name this 16th day of February, A. D. 1916.

Witnesses:

HAZEL A. J ONES,

I'J LES. W. ARMBRUST. 

